<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>搜索插入位置</title>
</head>

<body>
  <script>
    function array(arr, sum) {
      let len = arr.length
      for (let i = 0; i < len; i++) {
        if (arr[i] >= sum) {
          return i;
        }
        else {
          if (i == len - 1) {
            return len
          }
        }
      }
    }
    console.log(array([1, 2, 4, 6], 5))
  </script>
</body>

</html>